Round 1 of our Ultimate Law-Enforcement Crushes Bracket Tournament comes to a close with today’s quartet of match-ups, and that means we’ll soon be left with only 32 hotties from our initial field of 64.

Is CSI‘s Gil Grissom dusting off his forensics tools and getting back into the Vegas crime-fighting game? William Petersenreturned to the set of the long-running CBS crime dramathis week for a very special reason, and we’ve got the pictures to prove it. READ MORE & SEE PHOTOS